Finding the Fourth Proportional to 5,131.56, 7,085.70 and 3,556.92

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.56 : 7,085.70 = 3,556.92 : x
2. Step 2: Convert to fraction form
   5,131.56/7,085.70 = 3,556.92/x
3. Step 3: Cross multiply
   5,131.56x = 7,085.70 × 3,556.92
4. Step 4: Simplify right side
   5,131.56x = 25,203,268.04
5. Step 5: Solve for x
   x = 25,203,268.04/5,131.56
6. Step 6: Final answer
   x = 4,911.42